JPH09285903A - Throw away tip - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently provide a coated tip having a mark for identifying a corner and a uniform film in a throw away tip having no through-holes for clamping. SOLUTION: A through-hole 6 penetrating from an upper surface 2 to a lower surface is formed on a line connecting the center O of a throw away tip 1 with at least one corner 4 or in its vicinity, and this through-hole 6 is used as a mark for identifying a corner. When this throw away tip 1 is a coated tip, it is a tip set in a coating furnace by putting a linear material through the through-hole 6 and coated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a throw-away tip (hereinafter referred to as a tip) to be mounted on a cutting tool, and more particularly to a tip having a corner with an identification mark and a covering treatment.

[0002]

2. Description of the Related Art Marks for identification, which are formed on the rake face of a chip irrespective of the cutting action, have been conventionally proposed in various ways depending on its purpose and method. For example, the one disclosed in Japanese Utility Model Publication No. 3-40489 is provided with a small projection or a small recess for the purpose of displaying the dimension of the corner radius. The one disclosed in Japanese Utility Model Publication No. 57-11682 is such that a recess is formed as a mark for indicating the material of the chip, and in Japanese Utility Model Publication No. 61-78506, the purpose of indicating the order of use of the corners. Japanese Patent Laid-Open Publication No. 2004-242359 discloses that arithmetic numbers are printed or dots are provided. In addition, identification methods such as coating and coloring have been devised.

On the other hand, with respect to the coated chip, particularly the chip coated by the physical vapor deposition method, if the chip has a through hole for clamping such as a pin hole or a screw hole formed in the center, it becomes a coated base material. In general, a thin rod is passed through the through holes alternately with the spacers so that the rake faces do not come into contact with each other, and the thin rods are set in the coating furnace. This method is an effective means for obtaining an efficient and uniform coating process.

However, in the case of a chip which originally has no through hole for clamping, a method of placing it on a magnet board and setting it in a coating furnace has been conventionally used. This method is inferior in processing work efficiency as compared with the method for the holed tip. As a technique for solving this, there is one disclosed in Japanese Patent Laid-Open No. 5-177414. That is, a through hole having a diameter smaller than that of the pin hole is provided in the center of the chip.

[0005]

The through hole provided in the central portion of the chip described in the above publication is used only for setting when performing the coating process, and is, so to speak, discarded due to manufacturing reasons. It's a hole. The present invention has a function as a corner identification mark by a through hole which has not been seen in the past, and at the same time, can be used for a covering process.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a throw-away structure in which a tip mounting seat is provided in a tool body so that the tip can be detachably incorporated. In a chip which is used for a cutting tool of a type and in which a clamp hole for attachment / detachment is not drilled, a through hole is formed on the line connecting the center of the chip and at least one corner or in the vicinity thereof so as to pass from the upper surface to the lower surface. Then, the mark is used to identify the corner of the chip.

Further, in the case of the chip obtained by performing the coating treatment on the chip, the chip is set in the coating furnace by passing the wire through the through hole and subjected to the coating treatment. .

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The through hole in the present invention is the first
The purpose is to identify the corner. If at least one corner of the insert can be identified, by deciding the order in which the corners should be used when mounting them on the cutting tool, it is possible to make mistakes while leaving unused corners, or for work in the dark. It is possible to prevent the unused corners from being discarded without being confirmed, and it is possible to use all the corners without waste.

A second aspect of the present invention is to effectively use a through hole formed for identifying a corner as a setting during a covering process. Hereinafter, an embodiment of the present invention will be described as an example.

[0010]

EXAMPLE In FIG. 1, the throw-away tip 1 is
This is a positive-type chip that has a rectangular flat plate appearance and has a flank 3 having a clearance angle from the upper surface 2 serving as a rake surface to the lower surface formed on the outer peripheral surface. Further, chamfers are formed in chamfers at the four corners 4, and such chips are mainly used for front milling cutters. A breaker groove 5 is provided around the upper surface 2.
Are formed.

On the line connecting the center O of the chip and at least one of the corners 4 or in the vicinity thereof, and at a position apart from the breaker groove 5 directly involved in the cutting action, from the upper surface 2 to the lower surface. A through hole 6 is formed so as to come out. Due to the presence of at least one through hole 6, when the milling cutter is installed, for example, first the through hole 6
A corner with a corner is installed, and the corner is changed clockwise in sequence according to the life of the cutting edge so that it is used up.

When the chip 1 is coated, the through hole 6 is used as a setting hole as shown in FIG. That is, the chips 1 and the spacers 7 having holes are alternately skewed into wires or thin rod-shaped wires 8 and set in a coating furnace. Such a coating method is efficient because of its excellent workability, and the atmosphere gas is evenly supplied into the coating furnace, so that a uniform coating can be obtained.

FIG. 3 shows another embodiment of the present invention, in which the same parts are designated by the same reference numerals. This chip 1 has identification marks added to all four corners 4, and the number of identification marks is sequentially increased so that each corner 4 can be easily identified. At this time, the identification mark 9 excluding the through hole 6 may be formed as a through hole or a protrusion or a depression.

[0014]

According to the present invention, the user of the throw-away tip can effectively use the cutting edge because the corner to be used can be discriminated by the corner identification mark. For
Even if the chip does not have a hole for clamping,
It becomes possible to efficiently perform the coating process having a uniform coating.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a throw-away tip of the present invention.

FIG. 2 is an explanatory diagram showing an example of applying a covering treatment to the throw-away tip of the present invention.

FIG. 3 is a perspective view showing another embodiment of the throw-away tip of the present invention.

[Explanation of symbols]

 1 Throw-away tip 2 Top surface 4 Corner 6 Through hole 7 Spacer 8 Wire rod 9 Identification mark O Chip center

Claims (2)

[Claims] 1. A tool body is provided with a tip mounting seat to be used for a throw-away type cutting tool configured so that a throw-away tip can be removably incorporated, and a clamp hole for attachment / detachment is provided. In a throw-away tip that has not been formed, a through hole that goes from the upper surface to the lower surface is formed on or near the line connecting the center of the throw-away tip and at least one corner, and the corner of the throw-away tip is identified. Throw-away tip characterized by being marked. 2. The throw-away tip according to claim 1, wherein the throw-away tip is set in a coating furnace by passing a wire rod through the through hole and subjected to a coating treatment.